From: Janet Davis (jlnd_at_cs.washington.edu)
Date: Sat Jan 31 2004 - 17:40:45 PST
On Sat, 31 Jan 2004, Hendry Prasetyo wrote:
> I got a couple questions regarding the 2nd project.
>
> 1. Do we need to 'age' LSPs while they're stored in a node? I guess this
> is for the purpose of restarting a sequence number to 0 when a node is
> down.
Yes, you need to be able to accept a new LSP from a node within a
reasonable amount of time after the node fails and restarts at sequence
number 0.
> 2. Again about when a node is down, the book says that it may receive a
> copy of its own LSP? I'm wondering how that could happen as other nodes
> won't send any other LSPs except their own.
Hmmm... I think this is for OSPF, which uses a different flooding
technique than we do in Fishnet.
In OSPF, new neighbors synchronize their LS databases by sending each
other the entire contents of the databases. (This is faster than waiting
for all the other nodes to periodically resend their LSPs.) As a result,
a node could get a copy of one of its old LSPs from its neighbor.
Cheers,
Janet
-- Janet Davis jlnd_at_cs.washington.edu http://www.cs.washington.edu/homes/jlnd/ _______________________________________________ Cse461 mailing list Cse461_at_cs.washington.edu http://mailman.cs.washington.edu/mailman/listinfo/cse461
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